1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962855be8168bf7d4f258bbe59d74f8200363c95a481eb9d4d780d7c0beb9e6. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/666ce221-46cd-4eb9-979f-1ac7b8769c6d.json and https://artists.proofprofile.net/proofs/artist/666ce221-46cd-4eb9-979f-1ac7b8769c6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42251075a5c2e2f76fef056748859459db9b92a1b7df1146859e4e4c5e1eeb54. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2105736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9db9fbb98c4fcb1526a04ad8d48d31dfd4a4889b13fb9353cc24b3bb268c45. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2423779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321079f1503aecf1e6554daa93e0bfdcaa9d2ca58543810cefe1d748ca96136e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2423778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c202204d0e4cb85e577641ccfe8430ed0d1941c821e03ce3a52a977ed2b86. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2423776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b78047d9042e530c7c2aa0bf42f4de08da82cfecbf0ec908b083278c2eb5782. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:33:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2423777.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f23c665320d51d8285c8914fb3bee3643bccd0e5a09c22078d0e04a18e7533d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2493617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e9e3e91fe7dd00b1f0350c6c7606b9e07ae1cb9baee80fa3ebb4081c40f54f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2202740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d3847985d121ebd1ef54488fdd645c5866df8009d4de98e77088e14cd29a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2223417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104300eaadcb6194a6133fa3a396bb799d26fbb1b5bdf242b0c1d4f84bc00d42. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM24S2105733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6012e461e8a28f52104dc07627962fd9b3821672d07c61d1a82419d4bcbfd1e1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2450649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe258adb33d4bade44246dd3dbddc21f1400dc597c9dd322e977749010bc1e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2450657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43cf4d72cd61318eb721228d92c66e3e1cce04b4e0aa4cf46eed296fe6bd74c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2450661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc657e14f18aad6042d87ee59805b0785d663cbba39d1648997a7fd7a5824a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2450664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36113c91dfd1e92f8191a3d193f062a3b1fcff62537d19d6ba7696ee38fe0b4b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2324620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69372849fb1b9aed62543ff16bf1f1fe3d82e7ce55adc18c1280eb9d86d44d7e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2324621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1689ae2a4cb0f46cfb04446575270dab7c9a0db5e3c34d3774b33700aa032022. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2324622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97afaa615c11be3cdc93602dc72ce3914b707ddddef52a77fc0b934b74a6af2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2324623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f0037be31e099ec6c7d91b028e4846c5c5e13d295b9a08f411631eddcaadde. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2379654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb4ba69fe92a517da9e388ef5b048f5f39e6c495599013dab725acc63ed3088. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2379655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a97ca3e69c1f9de3e47f01bece29e96ea039a6bce1e473ce7ecff3cd6ba651. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR2379656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88206584c7dada4a1fbae094f0152ff114f710a24d5552d62b7a661f04e0d30c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2407681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205e83655e854f53725ad31cbb37f62fa336200688aeba0d204fedeef8462259. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2407683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d46769358507e8cd287f74de6595cee9f871efa2078711af552bc42455fc463. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2407685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9738fd2a2ce88d5cd43eaf51c84422efeaeca57fef63e21819db8eda67b3b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2407686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0730d3871cf1f8a2048e02bd3c72608317b382fcc1a5bb9ed1de6c8a1bf0a6ef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2407690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63669bf4cbc448b14fed7f4c739513ac98a481546aa9d302da0cd41b4e3d7b3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fe8a4929d02cfb037b2afed0aa35c81608a83dd4ffaa5e76a7b718b6d94b7b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7acce85dbb7729170572438c05dc358a37dc949a6eca54d2b2a6b101f38dd5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1db5df52761460f336f1aba04726ca938a20b1852a258be2b23b4a88ef0919. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c5252e28f0aec9c66090f2700bdb9e05cd2633c2342fbb3a70aed8a3973552. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6683139999463ddea6db367ec0e733f10fe6836748d7839ebc965a835faf6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8KE2306515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc01d376460146e7b3ba06c65bbefa1dd664735fd9ace752d799b93d5b3ad20. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBKQU2079870.